2014AJ....148...95W

Query : 2014AJ....148...95W

2014AJ....148...95W - Astron. J., 148, 95 (2014/November-0)

Photometric analysis of the overcontact binary CW Cas.

WANG J.J., QIAN S.B., HE J.J., LI L.J. and ZHAO E.G.

Abstract (from CDS):

New CCD photometric observations of overcontact binary CW Cas were carried out in 2004 and 2011. In particular, the light curve obtained in 2004 shows a remarkable O'Connell effect. Compared with light curves in different observing seasons, variations were found. These variations can be explained by dark spot activities on the surface of at least one component. Using the Wilson-Devinney code with a spot model, we find that the photometric solutions confirm CW Cas is a shallow W-subtype overcontact binary with a spotted massive component. Our new determined times of minimum light together with the others published in the literature were analyzed to find a change of orbital period. From the O - C curves, the period of the system shows a cyclic period change (P3= 69.9 yr, A3= 0.03196 days) superposed on the linear increase. The cyclic variation, if explained as the light-travel time effect, reveals the presence of a tertiary companion.

Abstract Copyright: ∼

Journal keyword(s): binaries: close - binaries: eclipsing - stars: individual: CW Cas

Simbad objects: 25

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Number of rows : 25
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2026 		#notes
1 TYC 4020-1349-1 * 00 45 09.6808387296 +63 06 11.719896192   11.65 10.78     ~ 2 0
2 TYC 4020-919-1 * 00 45 35.017 +63 05 02.05   13.07 12.10     ~ 2 0
3 V* CW Cas EB* 00 45 52.7049284568 +63 05 08.456733852   12.10 11.31 10.522 10.056 G8V 105 0
4 V* QX And SB* 01 57 57.7816919821 +37 48 22.453231805   11.736 11.25 11.23 10.68 F5 126 0
5 V* AH Tau EB* 03 47 11.9661390480 +25 06 59.375707992   11.59 11.07 11.09 10.436 G1p 83 0
6 V* EQ Tau SB* 03 48 13.4355167856 +22 18 50.924168856   12.04 11.18 10.082 9.706 G2V 129 0
7 BD+12 511 SB* 03 49 27.7666168464 +12 54 43.844508468   10.30 9.64     F8V 80 1
8 V* ER Ori SB* 05 11 14.5056264672 -08 33 24.613510680   10.02 9.46 8.927 8.604 F7/8V 187 0
9 V* DD Mon SB* 06 45 57.8383393056 -00 17 31.852613076   11.24 10.69     F6V 53 0
10 V* FG Hya SB* 08 27 03.9412969584 +03 30 52.329583548   10.62 10.04 9.544 9.401 G0 213 0
11 V* AM Leo SB* 11 02 10.8846331272 +09 53 42.657520560   9.86 9.33 8.895 8.417 F5V 200 0
12 V* CC Com SB* 12 12 06.0378799056 +22 31 58.682832024   13.09 11.42 10.543 10.085 K4/5V 228 0
13 V* VW Boo SB* 14 17 26.0324550672 +12 34 03.446878260   11.33 10.55 10.054 9.777 G5V 117 0
14 V* GR Vir SB* 14 45 20.2632619872 -06 44 04.131471300   8.54 8.00   7.34 G2/3V 151 0
15 V* AU Ser SB* 15 56 49.4686990368 +22 16 01.590650328   11.76 11.04 10.383 9.931 G4V 111 0
16 HD 150708A RS* 16 39 03.9794437032 +60 41 58.778276820   9.34 8.61     G5Vn 201 0
17 V* V1010 Oph SB* 16 49 27.6690355320 -15 40 04.682052912   6.40 6.19     A3V 158 0
18 V* AK Her SB* 17 13 57.8236051704 +16 21 00.618202044   9.04 8.51   7.874 F4V 271 0
19 V* V566 Oph SB* 17 56 52.4103516432 +04 59 15.326210328   8.03 7.58     F5V 262 0
20 V* V417 Aql SB* 19 35 24.1195136928 +05 50 17.661574140   11.23 10.63 10.629 10.276 G0V+F9V 131 0
21 V* OO Aql SB* 19 48 12.6525764880 +09 18 32.374957356   10.26 9.49 8.773 8.762 F9V 239 0
22 V* V1191 Cyg SB* 20 16 50.8171109208 +41 57 41.257475856   11.41 10.99 10.474 10.128 F6V 94 0
23 V* BI Vul EB* 21 22 48.0350619264 +27 01 39.846690516           ~ 56 0
24 V* V1073 Cyg SB* 21 25 00.3578881488 +33 41 14.938809648   8.78 8.38     A1VpSi: 153 0
25 HD 216598 SB* 22 53 41.6540031672 +37 56 18.607477416   9.65 8.91     K0Vv 380 0

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